Journal
JOURNAL OF SPORT AND HEALTH SCIENCE
Volume 10, Issue 4, Pages 419-429Publisher
SHANGHAI UNIV SPORT
DOI: 10.1016/j.jshs.2020.12.006
Keywords
Glucose; Insulin; Physical activity interruption; Prolonged sitting; Meta-analytic review
Funding
- National Key Research and Development Program of China [2020YFC2003301, 2020YFC2007005]
- National Natural Science Foundation of China [81703252]
- Shanghai Committee of Science and Technology of China [19080503000]
- Public Welfare Technology Project of the Zhejiang Science Department [LGF18H170006]
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Replacing prolonged sitting with moderate-intensity physical activity interruptions has a positive effect on reducing postprandial glycemia and insulin responses, with moderate-intensity interruptions being the optimal intervention strategy.
Purpose: This study aimed to evaluate the effectiveness of physical activity (PA) interrupting prolonged sitting (PS) on postprandial glycemia and insulin responses among adults. Methods: PubMed, EMBASE, Cochrane Library, Web of Science, CINAHL, PsycINFO, and the China National Knowledge Infrastructure databases were searched through September 30, 2020. Randomized controlled trials (RCTs) that examined the effect of all forms of PA interrupting PS on postprandial glycemia and/or insulin responses among adults without chronic diseases were included in this study. The risk of bias of included studies was evaluated based on the Cochrane tool. A network meta-analysis was performed to estimate the summary standardized mean differences (SMDs) with 95% confidence intervals (95%CIs) with random effects. Results: Thirty crossover RCTs were included in our review. These RCTs included 9 types of interventions that interrupted PS. When compared to PS by itself, light-intensity PA intermittent interrupting (LPA-INT) PS and moderate-intensity PA intermittent interrupting (MPA-INT) PS significantly lowered postprandial glycemia (SMD = -0.46, 95%CI: -0.70 to -0.21; SMD = -0.69, 95%CI: - 1.00 to -0.37, respectively) and significantly reduced postprandial insulin response (SMD = -0.46, 95%CI: -0.66 to - 0.26; SMD =-0.47, 95%CI: -0.77 to -0.17, respectively). Results of the clustered ranking plot indicated that MPA-INT was the most effective intervention in lowering postprandial glycemia and insulin responses. Conclusion: Replacing PS with MPA-INT or LPA-INT has a positive effect in reducing postprandial glycemia and insulin responses, with MPA-INT being the optimal intervention strategy.
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